package avnf_large;

import java.util.ArrayList;
import java.util.Comparator;
import java.util.List;

/**
 * @author shentianyu
 * @date 2020-11-10 19:46
 */
public class Test {

    public static void main(String[] args) {
        StringBuilder str1 = new StringBuilder();
        str1.append("ac"+"\n");
        //str1.append("\n");
        str1.append("b");
        System.out.println(str1.toString());
    }

}

class ListNode {
    int val;
    ListNode(int val){
        this.val = val;
    }
}
